The inquest into the mysterious death of a British conspiracy theorist who died after vomiting two litres of black blood has been delayed again.

Max Spiers' body was discovered while he was on a trip to Poland for a conference.

The 39-year-old died suddenly on the sofa in the home of science fiction writer, Monika Duval, in July last year.

Father-of-two Max died after vomiting the black fluid, but Polish officials ruled he died from natural causes, even though a post-mortem was not carried out.

His inquest opened in December 2016 and was due to resume this Thursday in Maidstone, Kent.

Max Spiers was found dead while he was due to attend a conference in Poland (Image: Youtube/Max Spiers)

Max Spiers was a well known conspiracy theorist (Image: Facebook)

But it has now been adjourned once more, with little prospect of it now happening this year.

Max had become world-famous in the shadowy world of conspiracy theories and allegedly made many "enemies" in his investigations.

Authorities in Poland, where Max was attending a conference, initially concluded the sudden death was due to natural causes.

After his body was repatriated to the UK, doctors at a Margate hospital were unable to determine the cause of his death.

Max was found dead on the sofa of a science fiction writer (Image: BBC)

Kent Police then launched a joint investigation with Polish police into the conspiracy theorist's death.

At an inquest opening in Canterbury in December 2016, the court heard how the 39-year-old had been visiting Poland to speak at a conference after holidaying with a friend in Cyprus.

In a statement, coroner's investigations officer Caroline O'Donnell said: "When they returned, Mr Spiers became ill with a high temperature and was weak.

"The following day, Mr Spiers vomited two litres of black fluid. The friend called a doctor who attempted resuscitation before pronouncing him dead."

Max's inquest has been delayed again (Image: Gofundme)

Shortly before his death, Mr Spiers was said to have been probing into the lives of well-known figures in politics, business and entertainment.

At the time his mum Vanessa Bates, 63 said she feared the worst.

She said: "I think Max had been digging in some dark places and somebody wanted him dead."

She is hopeful the investigation will shed light on the mysterious death.

Vanessa Bates and son Max Spiers (Image: Facebook)

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"It's been a long time coming, but I'm just relieved that at last something is happening and there is a proper investigation and inquest," she added.

Her theory was shared by many online, with other conspiracy theorists, UFO investigators and bloggers calling the circumstances of Mr Spiers' death suspicious.

At the time, Coroner Alan Blunsdon told the court he was still awaiting a report from Polish authorities, adding that the workload of Kent Police may delay forensic analysis of Mr Spiers' phone and computer.

When the conspiracy theorist's body was transported to the UK, his laptop and phone weren't among his belongings.

Doctors at QEQM Hospital, Margate, were unable to determine Max's cause of death

His mum has always believed Max was "murdered by his enemies".

Just days before his death, the dad-of-two had texted his mum Vanessa Bates the chilling message: "Your boy's in trouble. If anything happens, investigate."

His mum, 63, said: "I think Max had been digging in some dark places and somebody wanted him dead."

Mr Spiers, who went to school with Orlando Bloom, had visited Poland after holidaying in Cyprus with a friend, who later discovered his body.